* {
    margin: 0;
    padding: 0;
    /*color: #fff;*/
    list-style: none;
    text-align: center;
    text-decoration: none;
}

html {
    scroll-behavior: smooth;
}

header {
    transition: all 0.5s ease;
    max-width: 767px;
    min-width: 320px;
    width: 100%;

    background-size: 100%;
    background-position: top;
    background-repeat: no-repeat;
    position: relative;

    @media screen and (min-width: 421px) {
        height: 274px;
        transition: all 0.5s ease;
    }
    @media screen and (max-width: 420px) {
        height: 180px;
    }

    .header-nav {
        width: 100%;
        height: 93px;
        background-color: rgba(0, 0, 0, 0.6);
        position: fixed;
        top: 0;
        z-index: 999;

        .header-nav-box {
            width: 100%;
            height: 93px;
            display: flex;
            flex-wrap: nowrap;
            justify-content: space-between;
            align-items: center;

            .logo {
                width: 234px;
                height: 69px;

                img {
                    width: 234px;
                    height: 69px;
                }
            }

            nav {
                display: none;
            }

            .menu {
                width: 30px;
                height: 30px;
                margin-right: 15px;

                img {
                    width: 24px;
                    height: 24px;
                }
            }
        }

        .hideMenu {
            display: none;
        }
    }

    .tit {
        position: absolute;
        left: 50%;
        transform: translate(-50%, 0);
        color: #fff;

        @media screen and (min-width: 471px) {
            bottom: 15%;
            .tit-up {
                font-size: 22px;
                font-weight: bold;
            }

            .tit-down {
                font-size: 14px;
            }

            transition: all 0.5s ease;
        }
        @media screen and (max-width: 470px) {
            bottom: 35%;
            .tit-up {
                font-size: 18px;
                font-weight: bold;
            }

            .tit-down {
                font-size: 12px;
            }

            transition: all 0.5s ease;
        }
    }
}

.goTop {
    width: 35px;
    height: 35px;
    display: none;
    border-radius: 5px;
    cursor: pointer;
    transition: transform 0.5s ease;
    background-color: rgba(0, 0, 0, 0.8);
    position: fixed;
    right: 40px;
    bottom: 100px;
    z-index: 999;

    a {
        img {
            vertical-align: middle;
        }
    }
}

.goTop.on {
    display: block;
    transform: rotate(360deg);
}